| 摘要 |
An acoustical panel structure having a honeycomb core, and thin, dense, sound transmitting glass fiber mat of uniform thickness adhered to each of the opposed major surfaces of the core. A glass fiber sheet of greater thickness than the mats is secured to the outer surface of one of the mats. A decorative coating or layer is provided on the glass fiber sheet. The resulting structure has a noise reduction coefficient of upwards of 75, and a flame spread of less than 25.
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